Researchers in Bengaluru discovered CRIB, the world's most uncommon blood group antigen, from a Kolar woman, revolutionizing transfusion medicine. Check the blood types graph and know the most common & rare blood groups in India with updated percentage data. Easy chart explained for 2025. The question is more complicated than you might think. Let's discuss blood typing systems and what might be the rarest blood type in the world. Learn about the three rarest blood types in the United States: AB-, B- and AB+. Find out how blood type affects blood transfusion, compatibility, and health conditions.
